0.3x+7.8=9
3(x-2.1)=10.5
5.3x+1.6x=20.7
3.6÷1.2=
0.72÷0.9=
2.6÷13=
4.8÷0.4=
4.08÷4=
0.78÷6=
7.2÷0.4=
1÷0.25=